Why not post this in your other post?
Anyways, are you doing it this way:
https://files.minecraftforge.net/ > Pick a version and download it > Open it, hit install (Make sure Minecraft is closed. You probably already did this just making sure)
Open launcher > Click the little arrow pointing up, it's right next to the "Play" button > Scroll to the bottom and select the forge version you downloaded.
Also you usually don't need to make a new profile for forge versions, forge makes them for you.